Levofloxacin is more effective in the treatment of pneumonia, Levofloxacin is a respiratory quinolone, which has a broad-spectrum bactericidal activity, because of its pharmacokinetic characteristics, so that it contains a higher concentration in the lung tissue and bronchial secretions, which is more conducive to the control of lower respiratory tract infections. Levofloxacin has good antibacterial effect on common Escherichia coli, Haemophilus influenzae, Klebsiella pneumoniae, Proteus mirabilis, Streptococcus pneumoniae, as well as Mycoplasma, Chlamydia and Legionella. Therefore, it can be widely used in the treatment of community-acquired pneumonia and hospital-acquired pneumonia, but for severe lung infections or the presence of multi-drug-resistant bacterial infections, the effect of levofloxacin alone is not good, and it is necessary to combine with other drugs to strengthen the anti-infective treatment. In addition, levofloxacin has certain side effects and is contraindicated in pregnant women, minors and patients with epilepsy.